Energy Systems (ATP/PC, lactic acid and aerobic) Flashcards
Def: ATP/PC
The ATP/PC system is an anaerobic energy system. In other words, oxygen is not needed to synthesize ATP in the muscles.
- short burst of energy
Source of fuel: ATP/PC
Creatine phosphate
Efficiency: ATP/PC
Very fast but limited source of fuel
The PC runs out quickly resulting in this system no longer being available until it has begun to recover
Recovery: ATP/PC
Recovers as the creatine in the cell connect to the free phosphate again.
PC is restored in 30 secs - 2mins
Efficiency: ATP/PC
ATP/PC system does not last very long due to the limited source of fuel and fast ATP production
- will deplete its fuel in 8-12 seconds (depending on intensity)
Fatigue: ATP/PC
Depletion of PC and ATP (when there is no more fuel)
Byproducts: ATP/PC
Heat
As a result breaking phosphate groups off PC and ATP
Activities: ATP/PC
100m sprint, shot put, high jump
Intensity: ATP/PC
High intensity, 85% MHR
Energy Systems: TIFFBRAE
Time Intensity Fuel Fatigue Byproducts Recovery Activities Efficiency
Def: Lactic Acid
The lactic acid system is anaerobic in nature. The lactic acid system is the dominant system in sports.
Intensity: Lactic Acid
High intensity.
If the intensity is submaximal (just under absolute max) then the system lasts considerably longer
Source of fuel: Lactic Acid
Glycogen (carbohydrates)
Efficiency: Lactic Acid
Provides ATP quickly
Time: Lactic Acid
30 secs - 3mins
Depends on the intensity
Fatigue: Lactic Acid
build-up of lactic in the blood
Byproducts: Lactic Acid
Lactic acid
The burning sensation in the muscle, shortness of breath and fatigue are all symptoms of lactic acid build-up thus impacts the athlete’s ability to perform
Recovery: Lactic Acid
20 mins to 2 hours
Activites: Lactic Acid
200m or 400m run, 50-100m swim are highly reliant on the lactic acid system
Def: Aerobic system
Requires the presence of oxygen to ensure muscle contractions can continue. Oxygen is able to fill the muscle cells, reducing the accumulation of lactic acid in the muscles
the predominant system used during endurance events
Source of fuel: Aerobic system
carbohydrates, fat, and protein
Efficiency: Aerobic system
Very efficient in producing ATP
Time: Aerobic system
The aerobic system can produce ATP continuously for well over an hour or for as long as sources of fuel are avalible
Fatigue: Aerobic system
Fatigue occurs because of a lack of fuel this is called ‘hitting the wall’
